Method and apparatus for transmitting buffer status report by wireless node in wireless communication system
The present invention relates to a method of transmitting a buffer status report (BSR) by a wireless node in a wireless communication system. In particular, the method includes the steps of: receiving first logical channel group (LCG) configuration information including identities of LCGs from a network; generating the BSR including a LCG field; and transmitting the BSR to the network, wherein a length of the LCG field is configured according to a highest value of the identities of LCGs.
1. A method comprising:
receiving, by an Integrated Access and Backhaul (IAB) node from a network, configuration information related to logical channel groups (LCGs);
determining, by the IAB node, a length of a LCG field based on a maximum LCG identifier configurable for IAB node;
generating, by the IAB node, a buffer status report (BSR) including the LCG field having the determined length; and
transmitting, by the IAB node to the network, the BSR,
wherein the length of the LCG field is determined to floor(Y/8) plus 1 bytes,
wherein the maximum LCG identifier is equal to or larger than Y and less than Y+8, and
wherein Y is multiple of 8.
2. The method of claim 1 , wherein each bit of the LCG field indicates whether buffer size information of a corresponding LCG is present or not in the BSR.
3. The method of claim 1 , wherein the maximum LCG identifier is variable according to a number of nodes served by the IAB node.
4. The method of claim 1 , wherein the maximum LCG identifier is variable according to a number flows or a number of radio bearers served by the IAB node.
5. An Integrated Access and Backhaul (IAB) node comprising:
at least one processor; and
at least one computer memory storing instructions which, when executed by the at least one processor, cause the IAB node to perform operations comprising:
receiving, from a network, configuration information related to logical channel groups (LCGs);
determining a length of a LCG field based on a maximum LCG identifier configurable for IAB node;
generating a buffer status report (BSR) including the LCG field having the determined length; and
transmitting the BSR to the network,
wherein the length of the LCG field is determined to floor(Y/8) plus 1 bytes,
wherein the maximum LCG identifier is equal to or larger than Y and less than Y+8, and
wherein Y is multiple of 8.
6. The IAB node of claim 5 , wherein each bit of the LCG field indicates whether buffer size information of a corresponding LCG is present or not in the BSR.
7. The IAB node of claim 5 , wherein the maximum LCG identifier is variable according to a number of nodes served by the IAB node.
8. The IAB node of claim 5 , wherein the maximum LCG identifier is variable according to a number flows or a number of radio bearers served by the IAB node.
9. An apparatus for an Integrated Access and Backhaul (IAB) node, the apparatus comprising:
at least one processor; and
at least one computer memory storing instructions that, when executed by the at least one processor, cause the IAB node to perform operations comprising:
receiving, from a network, configuration information related to logical channel groups (LCGs);
determining a length of a LCG field based on maximum LCG identifier configurable for IAB node;
generating a buffer status report (BSR) including the LCG field having the determined length; and
transmitting the BSR to the network,
wherein the length of the LCG field is determined to floor(Y/8) plus 1 bytes,
wherein the maximum LCG identifier is equal to or larger than Y and less than Y+8, and
wherein Y is multiple of 8.
10. A non-transitory computer readable storage medium comprising program instructions that, when executed by at least one processor, cause an Integrated Access and Backhaul (IAB) node to perform operations comprising:
receiving, from a network, configuration information related to logical channel groups (LCGs);
determining a length of a LCG field based on a maximum LCG identifier for IAB node;
generating a buffer status report (BSR) including the LCG field having the determined length; and
transmitting the BSR to a network,
wherein the length of the LCG field is determined to floor(Y/8) plus 1 bytes,
wherein the maximum LCG identifier is equal to or larger than Y and less than Y+8, and
wherein Y is multiple of 8.